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Finding the Fourth Proportional to 1,738,720.80, 2,608,858.80 and 839,815.20

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Solution

The fourth proportional to 1,738,720.80, 2,608,858.80 and 839,815.20 is: 1,260,098.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,738,720.80 : 2,608,858.80 = 839,815.20 : x
  2. Step 2: Convert to fraction form
    1,738,720.80/2,608,858.80 = 839,815.20/x
  3. Step 3: Cross multiply
    1,738,720.80x = 2,608,858.80 × 839,815.20
  4. Step 4: Simplify right side
    1,738,720.80x = 2,190,959,274,893.76
  5. Step 5: Solve for x
    x = 2,190,959,274,893.76/1,738,720.80
  6. Step 6: Final answer
    x = 1,260,098.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.